5+1+2

两个方法，5＋1个字段
creatorId(String userId){
    this.createdDt = currentDate;
    this.createdBy = userId;
    this.lastModifiedDt = currentDate;(版本锁)
    this.lastModifiedBy = userId;
}

modifierId(String userId){
    this.lastModifiedDt = currentDate;
    this.lastModifiedBy = userId;
}

column
deleteInd "T" or "F"
mode "C" or "U" or "R"(Remove)